The Guild of Harmony works in secret to try and keep the various Factions vying for control of The Engine in check.
It will take whatever steps it feels necessary to maintain this delicate balance, ranging from simple foiling of plans and counter espionage to outright, bloody and rather effective direct action.
Whilst the Guild of Harmony operates with a single goal in mind it is, as has been noted, divided along sectarian lines into three basic schools of thought.
Each of these philosophical outlooks, known as “The Creeds” operates differently and will constantly work to have their theories and strategies adopted by the organisation as a whole.
It is a rare occasion indeed where any one Creed will have complete domination in any operation but more often than not any given plan will bear the hallmarks of one of them as their overall philosophy (or at least the plan they proposed) best fits the goals at hand.